Horn for talking-machines.



No. 889,480. PA TENTED JUNE 2, 1908.

S. MOSS. v

HORN FOR TALKING MACHINES.

APPLICATION FILED APR. 8. 1908.

Aflorney PATEITTBD JUNE 2, 1908. s. MOSS.

HORN FOR TALKING MACHINES.

APPLICATION FILED APE-.6. 1908.

2 SHEETS-SHEET 2.

Aftoruey r at their edge oints.

PATENT: 0mm

sTANIsLans MOSS;

or; H'ILADEV PH I I: fNNsYLvAnIa, assie von' To same a. VANDER;

IE'LINQ, or PHIL DELPHIA, PENNSYLVANIA. Y

nor-m mammals-Man acs.-

sgeciflcationot Letters Patent,

. Patented June 2,1903.

anaman n-again, 1903. Serial lie-125,366.

'Toiall whom Be it known that ,I;,-.SrrAN -IsLAus Moss, a

citizen'of'the UnitedStates, residi .at Phila- 'delphia," in the 'county ofPhilade phia and State of Penn's ,lvania, have invented an Improvement in "orns for Talking-Machines, ofi-"Which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings repl esenting "like parts.

he invention to be hereinafter described relates to horns for talking machines and more particularly to that general type of such devices employed in connection with sound recording and; producing instruments, commonly known as phonographic horns.

In order that sound waves may be produced or transmitted with substantial per:--

fection, it is essential-that the transmitting instrument sh all offer no obstructionto the free vibratoryllor other sound wave move- ,nIents, andith'at its transmitting surface present no 'tor angularchange of directlon, either in the iine of transmission or transverse thereto. It is of importance also that the transmitting instrument itself shall not give forth 'vibrations calculated to interfere with the sound Waves, all'as well understood by those skilled in the art, -These conside'ra tions are particularly true in the production and transmission of musical tones, so much so that even slight interference with the true sound wave movements, either by abrupt angular changes in directionof transmission by the horn itself, or' discordant vibrations in the horn material, becomes a matter 'of serious objection.

,struct horns for sound reproducing machines of metal either of-a'sin le piece or number of pieces joined together y a seam extending wooden strips laidtogether in two or more layers'or phes to break 'oi'nts, the strips of the several plies 'mutua y contributing to hold the strips of the other from separation In such veneer construction, however, strips forlnin the inner ply, along the surface of which tie sound waves travel, are not transversely curved into a mitted sound.

true circle as prescribed by the dimensions of the horn at any point in its axial length, and, moreover, there is an interruption in the continuity" of the inner horn surface near the flare-of the horn where the outer strips cover the spaces between the edges of the innerstrips, with the result that there is an objectionable interference with the trans- It-has been further proposed to form phonographic horns of a single ply or layer ofstrips by assembling a number of the stripsand then subjecting them to endwise and lateral compressionto secure the desired horn contour, but in such construction the edges of the strips do not present surfaces which can be brought into close union and joined, the result being that the strips separate along their-adjacent edges. Moreover, in this construction the individual strips do not presenttrue circular curves throu hout the axial length of the horn.

Wit these briefly stated considerations in view the present invention has for its object to rovi'de a photographic or like horn which sfiall be free from the objections noted, and present a structure formed of a single layer of thin wooden strips, which, previous to being assembled, are permanently bent longitudinally and transversely to give to I verse y or longitudinally, all as will herein- It has been proposed heretofore to con after more fully appear.

In the drawmgss-Figure 1 is a side perspective view of a horn embodying the features of the present invention; Fig-.2 is a central longitudinal section thereof; Fig. 3 is a detail view of the strengthening hoop which is secured to the flaring end of the horn; Fig. 4 is a perspective view of one of the' wooden blanks prior to being bent longitudinally and transversely; Fig. 5 is a'similar view of the blank of Fig. 4 after being permane ntly bent longitudinally and transversely,but prior to the bevel formation of its 1011 tudinal edges; Fig. 6 is a view similar to ig. 5, showing the previously bent 'strip provided with the radially beveled edges; and Fig. 7 is a perspective view of three of these permanently bent strips showpresent invention is composed of .a lurality of strips 3, referably formedof thin taper-i ing pieceao wood joined edgeto edge, it be- .p ing an important feature of the invention.

that such'strips ,be previously bent both lon'- gitudinally and transversely in res onse to the curvature of the horn, t at such edges be so formed as topresent'contactmg" surfaces' throughout their length when brought'together. In order that this result may e (properly secured, the strips are first produce -as flat, ta ering pieces of thin WOOd'Z, Fig.4, and bees individual strips.

are then bent in a suitablemold, both longitudinally and "transversely. The lo tudinal bend is determined by'the longitu form or flaring character of horn, and t transverse bend at aify' oint in the length of the strip is determine b the arc of a cir, cle,.the radius of which is t e semi-diameter of the horn at such point, so that throughout the length of the horn a substantially true and unobstructed circular interior surface will beformed. The strips, thus bent, areindicated at 3, Fig. 5, said bends, lengthwise and transversely of the strips, being made permanent by the application of heat while in -,,9 andjll representing the mold.. After the strip has thus been permanently bent, as in Fig; 5, the longitudinal edges 4, 4, are cut to a evel on the lines 5, 6, ig. 6, the bevel at any point in the length ofthe horn corresponding to the directionof a radiusof the horn at that point. Thus'the angle of the bevel of the edge 4 near the flared extremity of the horn will be represented, -Fig. 5, bytheline 5,6, the numeral 5 representing the center of the circle of horn curvature at that point. Likewise the bevel of thefedge 4 at intermediate points in the lengt-hof-the strip 3 will correspond to the lines-3 8; 9-10; 1112; the numerals 7, the center of horn curvature at that particular point. 7

Viewing Fig. 7, 1t will nowibe clear that, since'the edges 4, 4, of each of the strips 3 are out on the same bevel, or line 56, for instance, at any point, the faces of the edges 4, 4, of adjoining strilpls will present flush or abutt' surfaces w 'ch may be brought into fu contact throughout the length of the strips notwithstanding1 the fact that the strips, are curved bot transversely. The beveled surfaces of the edges 4, 4, are then glued together, and the strips themselves being permanently bent,- the glue connectionbetween such edges acts as a sufficient binder to hold the assembled strips in position.

At the flaring end of the born A, Fig. -1, a wooden hoop 13 is fglued, said hoop being preferably formed 0 a single strip of woo supplied with a ferrule 16, "metal, and, as indicated, this errule has its transmitted.

when the, tape is in place rest' longitudinally and 1 having overlapping ends 14, 15, suitably connected, as y glue or the like. The smaller end ofthe horn A, Figs. 1 and'2, is referably of extreme end 17, flush with the transverse ection extends intothe'interlor of the horn tending to disturb the true sound waves At some point intermediate its ends the horn A, Figs.1and 2, is preferably encircled by a textile band or tape 18. This band or.

lane of the horn at that end, so that no protape 18 is countersunk into the exterior surface of the horn, the strips 3 being provided with an exterior transverse groove 19, Fig. 2, so that the band or tape, while serving to increase the security with which the strips are held together, is prevented from displacement on the incline surface of the horn. Obviousl the number of bands ortapes 18 emplo ed on any particularhorn is-not mate-. ria as such number may be varied a cordto the particular circumstances oras the iii igment of the constructor may dictate.

n applying the band or tape "18, it is preferably moistened or saturatedwvith glue, and in such condition is stretched and laid in the oove 19 with its ends .overla ping. On

lying, the band or ta d willshrin ,thus binding thestrips 3,1eg'e to edgepermanently, in .a manner that bewell understood. a

"It is sometimes desirable to su port the horn from a point beyond'its smal er end by suspending it from a rod, stand, or the like. Means are herein provided for this purpose, such as an eye 20, Figs. 1 and 2, the ends 21,

or ,tapelS before 1t is la3) lied, and bent as indicated in Fig. '2, sa'

nt ends 21, 21, between the under surface of theta e--and t e outer wall of the groove 19. us the suspendi means or eye 20 does not extend throug' or into the wall of the horn, and offers no objectionable element in the transmission of' sound'b the horn. Obviously the band or I tape an suspendin .eye may be applied ina variety of ways, ut it is preferable, as foundin practice, that the band or ta e be secured in a groove. in the horn, and t at it be formed of textilematerial that, will conng, as thereby the hand tract or shrink in d .or tape not only wil not become displaced in use but will hold the strips 3 more securely with'their radially beveled faces in uniform contact.

From the construction described it will be noted that a horn is produced of a single layer of thin wooden strips previously bent both in a longitudinal and transverse direction; that the adjacent edges of the strips are beveled after the strips arel bent, so that edge faces extending in the direction of the radially of the horn throug y to present adjacent faces coincident throughtogether edge to edge,

radius of the horn areproduced throughout the len th of the strips even though the strips themselves vary in curvature at different points; and that the radially beveled ed es present ..contacting faces. throu hout.- bviously, also,- the cross-sectional contour of the horn at any point will present a substantially true circle, there being no shoulders, angles, or. interruptions to the interior horn surface either transversely or longitudinally.

1. A horn for talkin machines comprising a conically tapering iody composed of a single layer of lndivldual wooden strips previously bent into permanent shape both lon itudinally and transversely, the longitudinal edges of said stri s being beveled out their length out, and means to hold said strips in assembled relation edge to edge.- I 2. Ahorn for tal machines com rising a conically tapered odycompose of a single layer of individual wooden strips pre vio'usly bent into permanent. shape both longitudinally and; transversely andglued" the longitudinal edges of said strips being beveled radially of the horn throughout their len 'th to present plane faces coincident throngdiout.

.3. -A horn for talking machines comprising.

a .conically-tapered body portion compose of. a single layer of individual wooden stripspreviously bent intoshape both longitudinally and transversely the longitudinal edges of said strips being beveled radiallyof the horn throughouttheir len th to present contacting plane faces coinci ent throughout, the said radial plane-faces 'ofadjoining strips being glued together, the exterior sur-' face of the horn being provided with an en-' circling band or tape. 4. A horn for talking machines comprising "a single series of ta ering wooden strips bent in both a longitu inaland. transverse encircling groove.

in both a longitudinal and the next adjoining strips, a ferrule embrac *the strips at faces coincident direction, and having ed e with an exterlor throu hout and provide encirc in'g groove, and a textile band or tape a passing around the horn and seated in said 5. A horn for talking machines comprising a single series of tapering wooden strips bent tion and glued together edge to edge said 'edgeshaving faces coincident throughout,

I around said horn, and

a band or tape pass' band or tape for supmeanssecured to sai porting the horn. I

6. A horn for talking machines comprising a single series-0f ta ering wooden strips bent tion, andglued togethere'dge to edge,

transverse direc'' the in both alongitudmal and transverse d rec said horn having an encircling exterior groove,

a textile band or tape passing around porting eye secured to sai tape.

said horn afnd seated in said move, and a sup- 7. A hornfolr talking machines comprising 7 a single series of tapering Wooden strips previously bent I into shape both longitudinally and transversel faces .eoincident throng out, and glued togethe1,, and y 8. A'horn for talking inachines comprising a single series of wooden strips previously having beveled edges, the beveled e and having edge a textile band encircling the horn ntermediate its ends.

Zbent longitudinally and transversely and ges of one strip being glued to the beveled edges of g 

